相关实验视频
Updated: May 22, 2025

10:09
Inducible T7 RNA Polymerase-mediated Multigene Expression System, pMGX
Published on: June 27, 2017
13.2K
一种基于银河糖的自我表达系统改善了大肠杆菌中T7可诱导蛋白质的产生
James Bosco1, Emily Gagliano2, Kassandra L Boshae2
1Division of Biological Sciences, Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Dynamics, Center for Structural and Functional Neuroscience, Center for Environmental Health Sciences, University of Montana, Missoula, MT, 59812, USA. james.bosco@umontana.edu.
Scientific reports
|March 16, 2025
概括
研究人员开发了一种新的自我表达媒介,使用银河糖来促进大肠杆菌 (E. coli) 的蛋白质生产. 这一突破提高了各种蛋白质的产量,包括具有挑战性的蛋白质,加速了生物技术的进步.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 微生物工程 微生物工程
背景情况:
- 大肠杆菌 (E. coli) 对于重组蛋白质生产至关重要.
- 优化大肠杆菌蛋白质表达对生物技术和结构生物学至关重要.
- 目前的方法面临着各种蛋白质类型的产量和效率的局限性.
研究的目的:
- 开发和验证一种新型的自我表达媒介,用于增强大肠杆菌中的蛋白质生产.
- 为了研究银河糖在调节乳糖操作的作用,独立于已知的代谢途径.
- 为了证明介质在各种蛋白质表达系统中的有效性.
主要方法:
- 开发一种使用银河糖诱导的新型自我表达媒介.
- 在多个大肠杆菌菌株中测试介质,包括lacZ缺乏变种.
- 评估标准和复杂蛋白质的蛋白质产量和纯度 (例如,eGFP,人类细胞染色体c,SpCas9).
主要成果:
- 银河糖在大肠杆菌菌株中成功诱导了自身表达,即使是那些有破坏 lacZ.
- 这种新型介质显著增加了像EGFP这样的常规表达蛋白质的产量.
- 观察到人类细胞染色体c的表达改善和具有二硫化键的蛋白质的强烈自表达.
- 通过可重复的方法实现了≥95%纯度的SpCas9产量的8倍增加.
结论:
- 这种新型的自我表达媒介有效地最大限度地提高了大肠杆菌中的蛋白质生产.
- galaktose-mediated lac operon调节为蛋白质表达提供了一个新的策略.
- 这一进步简化了常规和具有挑战性的蛋白质的生产,使生物技术和结构生物学受益.
相关概念视频
Operons
48.5K
Prokaryotes can control gene expression through operons—DNA sequences consisting of regulatory elements and clustered, functionally related protein-coding genes. Operons use a single promoter sequence to initiate transcription of a gene cluster (i.e., a group of structural genes) into a single mRNA molecule. The terminator sequence ends transcription. An operator sequence, located between the promoter and structural genes, prohibits the operon’s transcriptional activity if bound by...
48.5K
Prokaryotic Transcriptional Activators and Repressors
20.6K
The organization of prokaryotic genes in their genome is notably different from that of eukaryotes. Prokaryotic genes are organized, such that the genes for proteins involved in the same biochemical process or function are located together in groups. This group of genes, along with their regulatory elements, are collectively known as an operon. The functional genes in an operon are transcribed together to give a single strand of mRNA known as polycistronic mRNA.
Transcription of prokaryotic...
Transcription of prokaryotic...
20.6K
Reporter Genes
11.1K
Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
11.1K

